“Crimson and Clover”  was released in late 1968 as a rough mix after a radio station leaked it.  It spent 16 weeks on the U.S. charts, reaching number one in the United States and other countries.  The single has sold 5 million copies, making it Tommy James and the Shondells’ best-selling song.  In 2006, Pitchfork Media named it the 57th best song of the 1960’s.  (More from Wikipedia)